active no reseaux

Hello,
I am in France, and I use google translation to get message.
I bought the active vernee to replace my samsung xcover3.
I received it recently, at the start, an update was made via the wifi it works well.
I inserted the sim card operator Bouygue Telecom, and tests the GPS well, but impossible to make a call.
network configuration vpn, mms, sms, is good. I select search networks, and he finds all operators sfr, orange, free, but not bouygues.
to reassure me, I do the same operation with the xcover3 and it works very well (it does not come from the sim card). the same test was done with the sim card of other operators, he see all the operator, except that of the sim card.
I emphasize that it is (slot sim 1 or 2).
I reinitialize the active sun and start again, still impossible to make a call, it launches for 2 minutes then stops the communication.
when I receive a call, it cuts the communiction when I pick up. (Unbearable).
the xcover3 has two network bars, the vernee has nothing. no networks.
I realized that when the screen is off it captures the networks in the city center.
when the sun is used by an application, (screen on), it does not receive calls.
is there a conflict or a bug ???
I hope you can do something for me
cordially